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<div id="overview"><a href="../../../../../../../api/org/jboss/netty/handler/codec/spdy/SpdyFrameEncoder.html">View Javadoc</a></div><pre>

<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2014 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.handler.codec.spdy;
<a class="jxr_linenumber" name="17" href="#17">17</a>  
<a class="jxr_linenumber" name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> <strong class="jxr_keyword">static</strong> org.jboss.netty.handler.codec.spdy.SpdyCodecUtil.*;
<a class="jxr_linenumber" name="19" href="#19">19</a>  
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffer;
<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffers;
<a class="jxr_linenumber" name="22" href="#22">22</a>  
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.nio.ByteOrder;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.util.Set;
<a class="jxr_linenumber" name="25" href="#25">25</a>  
<a class="jxr_linenumber" name="26" href="#26">26</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="27" href="#27">27</a>  <em class="jxr_javadoccomment"> * Encodes a SPDY Frame into a {@link ChannelBuffer}.</em>
<a class="jxr_linenumber" name="28" href="#28">28</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyFrameEncoder.html">SpdyFrameEncoder</a> {
<a class="jxr_linenumber" name="30" href="#30">30</a>  
<a class="jxr_linenumber" name="31" href="#31">31</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> version;
<a class="jxr_linenumber" name="32" href="#32">32</a>  
<a class="jxr_linenumber" name="33" href="#33">33</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_javadoccomment">     * Creates a new instance with the specified {@code spdyVersion}.</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="36" href="#36">36</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyFrameEncoder.html">SpdyFrameEncoder</a>(<a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyVersion.html">SpdyVersion</a> spdyVersion) {
<a class="jxr_linenumber" name="37" href="#37">37</a>          <strong class="jxr_keyword">if</strong> (spdyVersion == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="38" href="#38">38</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"spdyVersion"</span>);
<a class="jxr_linenumber" name="39" href="#39">39</a>          }
<a class="jxr_linenumber" name="40" href="#40">40</a>          version = spdyVersion.getVersion();
<a class="jxr_linenumber" name="41" href="#41">41</a>      }
<a class="jxr_linenumber" name="42" href="#42">42</a>  
<a class="jxr_linenumber" name="43" href="#43">43</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> writeControlFrameHeader(<a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> buffer, <strong class="jxr_keyword">int</strong> type, byte flags, <strong class="jxr_keyword">int</strong> length) {
<a class="jxr_linenumber" name="44" href="#44">44</a>          buffer.writeShort(version | 0x8000);
<a class="jxr_linenumber" name="45" href="#45">45</a>          buffer.writeShort(type);
<a class="jxr_linenumber" name="46" href="#46">46</a>          buffer.writeByte(flags);
<a class="jxr_linenumber" name="47" href="#47">47</a>          buffer.writeMedium(length);
<a class="jxr_linenumber" name="48" href="#48">48</a>      }
<a class="jxr_linenumber" name="49" href="#49">49</a>  
<a class="jxr_linenumber" name="50" href="#50">50</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encodeDataFrame(<strong class="jxr_keyword">int</strong> streamId, <strong class="jxr_keyword">boolean</strong> last, <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> data) {
<a class="jxr_linenumber" name="51" href="#51">51</a>          byte flags = last ? SPDY_DATA_FLAG_FIN : 0;
<a class="jxr_linenumber" name="52" href="#52">52</a>          <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> header = ChannelBuffers.buffer(ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE);
<a class="jxr_linenumber" name="53" href="#53">53</a>          header.writeInt(streamId &amp; 0x7FFFFFFF);
<a class="jxr_linenumber" name="54" href="#54">54</a>          header.writeByte(flags);
<a class="jxr_linenumber" name="55" href="#55">55</a>          header.writeMedium(data.readableBytes());
<a class="jxr_linenumber" name="56" href="#56">56</a>          <strong class="jxr_keyword">return</strong> ChannelBuffers.wrappedBuffer(header, data);
<a class="jxr_linenumber" name="57" href="#57">57</a>      }
<a class="jxr_linenumber" name="58" href="#58">58</a>  
<a class="jxr_linenumber" name="59" href="#59">59</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encodeSynStreamFrame(
<a class="jxr_linenumber" name="60" href="#60">60</a>              <strong class="jxr_keyword">int</strong> streamId, <strong class="jxr_keyword">int</strong> associatedToStreamId, byte priority, <strong class="jxr_keyword">boolean</strong> last, <strong class="jxr_keyword">boolean</strong> unidirectional,
<a class="jxr_linenumber" name="61" href="#61">61</a>              <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> headerBlock) {
<a class="jxr_linenumber" name="62" href="#62">62</a>          byte flags = last ? SPDY_FLAG_FIN : 0;
<a class="jxr_linenumber" name="63" href="#63">63</a>          <strong class="jxr_keyword">if</strong> (unidirectional) {
<a class="jxr_linenumber" name="64" href="#64">64</a>              flags |= SPDY_FLAG_UNIDIRECTIONAL;
<a class="jxr_linenumber" name="65" href="#65">65</a>          }
<a class="jxr_linenumber" name="66" href="#66">66</a>          <strong class="jxr_keyword">int</strong> length = 10 + headerBlock.readableBytes();
<a class="jxr_linenumber" name="67" href="#67">67</a>          <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + 10);
<a class="jxr_linenumber" name="68" href="#68">68</a>          writeControlFrameHeader(frame, SPDY_SYN_STREAM_FRAME, flags, length);
<a class="jxr_linenumber" name="69" href="#69">69</a>          frame.writeInt(streamId);
<a class="jxr_linenumber" name="70" href="#70">70</a>          frame.writeInt(associatedToStreamId);
<a class="jxr_linenumber" name="71" href="#71">71</a>          frame.writeShort((priority &amp; 0xFF) &lt;&lt; 13);
<a class="jxr_linenumber" name="72" href="#72">72</a>          <strong class="jxr_keyword">return</strong> ChannelBuffers.wrappedBuffer(frame, headerBlock);
<a class="jxr_linenumber" name="73" href="#73">73</a>      }
<a class="jxr_linenumber" name="74" href="#74">74</a>  
<a class="jxr_linenumber" name="75" href="#75">75</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encodeSynReplyFrame(<strong class="jxr_keyword">int</strong> streamId, <strong class="jxr_keyword">boolean</strong> last, <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> headerBlock) {
<a class="jxr_linenumber" name="76" href="#76">76</a>          byte flags = last ? SPDY_FLAG_FIN : 0;
<a class="jxr_linenumber" name="77" href="#77">77</a>          <strong class="jxr_keyword">int</strong> length = 4 + headerBlock.readableBytes();
<a class="jxr_linenumber" name="78" href="#78">78</a>          <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + 4);
<a class="jxr_linenumber" name="79" href="#79">79</a>          writeControlFrameHeader(frame, SPDY_SYN_REPLY_FRAME, flags, length);
<a class="jxr_linenumber" name="80" href="#80">80</a>          frame.writeInt(streamId);
<a class="jxr_linenumber" name="81" href="#81">81</a>          <strong class="jxr_keyword">return</strong> ChannelBuffers.wrappedBuffer(frame, headerBlock);
<a class="jxr_linenumber" name="82" href="#82">82</a>      }
<a class="jxr_linenumber" name="83" href="#83">83</a>  
<a class="jxr_linenumber" name="84" href="#84">84</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encodeRstStreamFrame(<strong class="jxr_keyword">int</strong> streamId, <strong class="jxr_keyword">int</strong> statusCode) {
<a class="jxr_linenumber" name="85" href="#85">85</a>          byte flags = 0;
<a class="jxr_linenumber" name="86" href="#86">86</a>          <strong class="jxr_keyword">int</strong> length = 8;
<a class="jxr_linenumber" name="87" href="#87">87</a>          <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + length);
<a class="jxr_linenumber" name="88" href="#88">88</a>          writeControlFrameHeader(frame, SPDY_RST_STREAM_FRAME, flags, length);
<a class="jxr_linenumber" name="89" href="#89">89</a>          frame.writeInt(streamId);
<a class="jxr_linenumber" name="90" href="#90">90</a>          frame.writeInt(statusCode);
<a class="jxr_linenumber" name="91" href="#91">91</a>          <strong class="jxr_keyword">return</strong> frame;
<a class="jxr_linenumber" name="92" href="#92">92</a>      }
<a class="jxr_linenumber" name="93" href="#93">93</a>  
<a class="jxr_linenumber" name="94" href="#94">94</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encodeSettingsFrame(<a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySettingsFrame.html">SpdySettingsFrame</a> spdySettingsFrame) {
<a class="jxr_linenumber" name="95" href="#95">95</a>          Set&lt;Integer&gt; ids = spdySettingsFrame.getIds();
<a class="jxr_linenumber" name="96" href="#96">96</a>          <strong class="jxr_keyword">int</strong> numSettings = ids.size();
<a class="jxr_linenumber" name="97" href="#97">97</a>  
<a class="jxr_linenumber" name="98" href="#98">98</a>          byte flags = spdySettingsFrame.clearPreviouslyPersistedSettings() ?
<a class="jxr_linenumber" name="99" href="#99">99</a>              SPDY_SETTINGS_CLEAR : 0;
<a class="jxr_linenumber" name="100" href="#100">100</a>         <strong class="jxr_keyword">int</strong> length = 4 + 8 * numSettings;
<a class="jxr_linenumber" name="101" href="#101">101</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + length);
<a class="jxr_linenumber" name="102" href="#102">102</a>         writeControlFrameHeader(frame, SPDY_SETTINGS_FRAME, flags, length);
<a class="jxr_linenumber" name="103" href="#103">103</a>         frame.writeInt(numSettings);
<a class="jxr_linenumber" name="104" href="#104">104</a>         <strong class="jxr_keyword">for</strong> (Integer id : ids) {
<a class="jxr_linenumber" name="105" href="#105">105</a>             flags = 0;
<a class="jxr_linenumber" name="106" href="#106">106</a>             <strong class="jxr_keyword">if</strong> (spdySettingsFrame.isPersistValue(id)) {
<a class="jxr_linenumber" name="107" href="#107">107</a>               flags |= SPDY_SETTINGS_PERSIST_VALUE;
<a class="jxr_linenumber" name="108" href="#108">108</a>             }
<a class="jxr_linenumber" name="109" href="#109">109</a>             <strong class="jxr_keyword">if</strong> (spdySettingsFrame.isPersisted(id)) {
<a class="jxr_linenumber" name="110" href="#110">110</a>               flags |= SPDY_SETTINGS_PERSISTED;
<a class="jxr_linenumber" name="111" href="#111">111</a>             }
<a class="jxr_linenumber" name="112" href="#112">112</a>             frame.writeByte(flags);
<a class="jxr_linenumber" name="113" href="#113">113</a>             frame.writeMedium(id);
<a class="jxr_linenumber" name="114" href="#114">114</a>             frame.writeInt(spdySettingsFrame.getValue(id));
<a class="jxr_linenumber" name="115" href="#115">115</a>         }
<a class="jxr_linenumber" name="116" href="#116">116</a>         <strong class="jxr_keyword">return</strong> frame;
<a class="jxr_linenumber" name="117" href="#117">117</a>     }
<a class="jxr_linenumber" name="118" href="#118">118</a> 
<a class="jxr_linenumber" name="119" href="#119">119</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encodePingFrame(<strong class="jxr_keyword">int</strong> id) {
<a class="jxr_linenumber" name="120" href="#120">120</a>         byte flags = 0;
<a class="jxr_linenumber" name="121" href="#121">121</a>         <strong class="jxr_keyword">int</strong> length = 4;
<a class="jxr_linenumber" name="122" href="#122">122</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + length);
<a class="jxr_linenumber" name="123" href="#123">123</a>         writeControlFrameHeader(frame, SPDY_PING_FRAME, flags, length);
<a class="jxr_linenumber" name="124" href="#124">124</a>         frame.writeInt(id);
<a class="jxr_linenumber" name="125" href="#125">125</a>         <strong class="jxr_keyword">return</strong> frame;
<a class="jxr_linenumber" name="126" href="#126">126</a>     }
<a class="jxr_linenumber" name="127" href="#127">127</a> 
<a class="jxr_linenumber" name="128" href="#128">128</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encodeGoAwayFrame(<strong class="jxr_keyword">int</strong> lastGoodStreamId, <strong class="jxr_keyword">int</strong> statusCode) {
<a class="jxr_linenumber" name="129" href="#129">129</a>         byte flags = 0;
<a class="jxr_linenumber" name="130" href="#130">130</a>         <strong class="jxr_keyword">int</strong> length = 8;
<a class="jxr_linenumber" name="131" href="#131">131</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + length);
<a class="jxr_linenumber" name="132" href="#132">132</a>         writeControlFrameHeader(frame, SPDY_GOAWAY_FRAME, flags, length);
<a class="jxr_linenumber" name="133" href="#133">133</a>         frame.writeInt(lastGoodStreamId);
<a class="jxr_linenumber" name="134" href="#134">134</a>         frame.writeInt(statusCode);
<a class="jxr_linenumber" name="135" href="#135">135</a>         <strong class="jxr_keyword">return</strong> frame;
<a class="jxr_linenumber" name="136" href="#136">136</a>     }
<a class="jxr_linenumber" name="137" href="#137">137</a> 
<a class="jxr_linenumber" name="138" href="#138">138</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encodeHeadersFrame(<strong class="jxr_keyword">int</strong> streamId, <strong class="jxr_keyword">boolean</strong> last, <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> headerBlock) {
<a class="jxr_linenumber" name="139" href="#139">139</a>         byte flags = last ? SPDY_FLAG_FIN : 0;
<a class="jxr_linenumber" name="140" href="#140">140</a>         <strong class="jxr_keyword">int</strong> length = 4 + headerBlock.readableBytes();
<a class="jxr_linenumber" name="141" href="#141">141</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + 4);
<a class="jxr_linenumber" name="142" href="#142">142</a>         writeControlFrameHeader(frame, SPDY_HEADERS_FRAME, flags, length);
<a class="jxr_linenumber" name="143" href="#143">143</a>         frame.writeInt(streamId);
<a class="jxr_linenumber" name="144" href="#144">144</a>         <strong class="jxr_keyword">return</strong> ChannelBuffers.wrappedBuffer(frame, headerBlock);
<a class="jxr_linenumber" name="145" href="#145">145</a>     }
<a class="jxr_linenumber" name="146" href="#146">146</a> 
<a class="jxr_linenumber" name="147" href="#147">147</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encodeWindowUpdateFrame(<strong class="jxr_keyword">int</strong> streamId, <strong class="jxr_keyword">int</strong> deltaWindowSize) {
<a class="jxr_linenumber" name="148" href="#148">148</a>         byte flags = 0;
<a class="jxr_linenumber" name="149" href="#149">149</a>         <strong class="jxr_keyword">int</strong> length = 8;
<a class="jxr_linenumber" name="150" href="#150">150</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> frame = ChannelBuffers.buffer(ByteOrder.BIG_ENDIAN, SPDY_HEADER_SIZE + length);
<a class="jxr_linenumber" name="151" href="#151">151</a>         writeControlFrameHeader(frame, SPDY_WINDOW_UPDATE_FRAME, flags, length);
<a class="jxr_linenumber" name="152" href="#152">152</a>         frame.writeInt(streamId);
<a class="jxr_linenumber" name="153" href="#153">153</a>         frame.writeInt(deltaWindowSize);
<a class="jxr_linenumber" name="154" href="#154">154</a>         <strong class="jxr_keyword">return</strong> frame;
<a class="jxr_linenumber" name="155" href="#155">155</a>     }
<a class="jxr_linenumber" name="156" href="#156">156</a> }
</pre>
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